Improper Encoding or Escaping of Output Affecting awssdk.extensions.cloudfront.signers package, versions [,4.0.0.26)
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Start learning- Snyk IDSNYK-DOTNET-AWSSDKEXTENSIONSCLOUDFRONTSIGNERS-15810499
- published29 Mar 2026
- disclosed27 Mar 2026
- creditUnknown
Introduced: 27 Mar 2026
New CVE NOT AVAILABLE CWE-116 (opens in a new tab)How to fix?
Upgrade AWSSDK.Extensions.CloudFront.Signers to version 4.0.0.26 or higher.
Overview
AWSSDK.Extensions.CloudFront.Signers is a package contains extension methods for creating signed URLs for Amazon CloudFront distributions and for creating signed cookies for Amazon CloudFront distributions using canned or custom policies.
Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output through the AmazonCloudFrontUrlSigner and AmazonCloudFrontCookieSigner policy document construction code in the CloudFront signers components. An attacker can alter the intended access restrictions in a signed URL or signed cookie policy by supplying resource or IP values containing quotes, backslashes, or control characters. The issue affects applications that pass untrusted input into CloudFront signed URL/cookie generation APIs such as SignUrl, BuildPolicyForSignedUrl, GetCookiesForCannedPolicy, and GetCookiesForCustomPolicy.